People's domestic water and heating are inseparable from gas-fired hot water boilers, and due to the special nature of their performance, they must comply with strict safety practices. So, how do you need to ensure the safety of gas-fired hot water boilers?

1. Before the work, carefully check whether the water supply, drainage, gas supply pipe accessories, safety valve, pressure gauge and water level gauge of the gas hot water boiler are sensitive, and the safety can be confirmed before the work can be carried out.

2. When you are in the water, you should use both hands to operate. First open the water gate with one hand, then open the water valve of the water injector with the other hand, and the water naturally flows into the furnace. When stopping, the valve should be closed first, then the water door should be closed. When the valve is opened and closed, the face must be avoided to avoid the accident caused by the soda.

3. During the operation of the gas hot water boiler, it is necessary to pay attention to check the various parts and observe whether the pressure and water level are within the normal range. The furnace workers are not allowed to leave the post without permission. When working in night shifts, avoid sleeping and not allowing sleep, so as to avoid accidents. When the boiler is discharged, each shift must be carried out once. The water level should be properly adjusted before the discharge, which is slightly higher than the normal water level by 2/3, and then discharged.

4. The water level gauge must be flushed once per shift. When flushing, follow the prescribed procedure, first close the water valve, open the drain valve, flush the steam valve, then pay attention to whether the steam is blocked; then close the steam valve, then pay attention to whether the water is blocked. When flushing the water valve, there is water and steam, and the time is a little longer to ensure that the fake water level is not available. Hot gas water boiler fuel must be inspected for safety to prevent the presence of explosive substances in the fuel to prevent explosion hazard.

5. Always check the temperature of the mechanical equipment and the motor casing. If the machine is faulty or the motor heat exceeds 60 degrees, stop the test immediately. When the gas hot water boiler is in normal operation, the steam pressure shall not exceed the specified working pressure, and the safety valve shall be inspected once a week on average.

The thermal efficiency is directly linked to the operating cost of the gas steam boiler. It is very important to understand the factors affecting the thermal efficiency of the boiler and to master the method of improving the thermal efficiency of the boiler.

Factors affecting boiler thermal efficiency:

First, the exhaust temperature of the furnace body. The higher the exhaust gas temperature, the lower the thermal efficiency; and vice versa.

Second, whether the fuel is completely burned. If the fuel cannot be completely burned, the boiler's thermal efficiency is also very low.

Third, the heat dissipation strength of the furnace wall. The stronger the heat dissipation of the boiler wall, the lower the thermal efficiency; and vice versa.

Fourth, the amount of scale in the furnace. The more scale, the worse the heat of the furnace and the lower the thermal efficiency.

Measures to improve boiler thermal efficiency:

First, reduce the heat loss of smoke exhaust

The temperature of the smoke is a comprehensive parameter for the design, operation and health of the boiler, and is the main reason affecting the thermal efficiency of the boiler. The exhaust gas temperature of ordinary gas boilers is around 220 °C. After calculation, the thermal efficiency will decrease by 1% for every 10 °C increase in smoke temperature.

FANGKUAI Boiler invested a lot of energy and money to reduce the heat loss of smoke exhaust. The boiler adopts advanced condensing technology to make full use of the residual heat of flue gas. The exhaust gas temperature can be reduced to about 50 °C, and the thermal efficiency is also increased to more than 107%.

Second, reduce fuel incomplete combustion heat loss

Sometimes, due to the poor heat of the furnace or the use of poor quality burners, the fuel cannot be fully burned, which reduces the thermal efficiency and requires a large amount of gas cost.

In solving this problem, FANGKUAI Boiler uses full premixed combustion technology. The natural gas and air are precisely adjusted before entering the burner to achieve the ideal state, so the fuel combustion is sufficient and uniform, and there is no need to worry about heat loss.

Third, the furnace wall heat dissipation

The problem of heat loss is unavoidable when the boiler is running. This is the physics conclusion.

We set up double-layer closed structure in the front and rear smoke boxes, more than 95% of the welding uses intelligent automatic machinery, and each layer is filled with multi-layer centrifugal glass wool for thermal insulation treatment, without ignoring every detail, to a great extent, reducing Loss of heat.

Fourth, the amount of scale in the furnace

Boiler feed water contains various impurities and calcium and magnesium ions, which will form scale when operated for a long time. The thermal conductivity of the scale is very low. When the surface is fouled by the heating surface, the thermal resistance increases, the exhaust temperature of the boiler rises, and the heat loss of the exhaust gas increases. In general, 1 mm of scale on the heated surface will increase the heat loss of the exhaust by 2%-4%.

We use high-quality soft water treatment equipment, operate the boiler feed water softening treatment device in strict accordance with the process, control the boiler feed water quality, and use the patented technology--scale online monitoring, real-time control of scale status, and regularly remind users to the boiler as a whole. Check and clean.

The above is the four methods provided by Fangfeng Boiler to improve the thermal efficiency of gas-fired boilers. You can check the boilers by referring to the above methods. If you have any problems with your boiler, please contact us immediately and our technical engineers will provide you with a solution for free.

How does gas-fired boiler combine energy-saving, environmental protection and intelligence? FANGKUAI Boiler has invested considerable capital and energy, and has diligently researched and introduced a boiler unit that meets the above conditions—gas module boiler.

Gas-fired boiler means that multiple gas-fired boilers are set by the joint control system, according to the dynamic parameters such as the set heating temperature curve, and with reference to the indoor and outdoor temperature difference changes or their own demand changes, intelligently carry out the boilers that automatically judge the departure and shutdown. The number of running units can achieve near-unattended work mode and avoid waste of resources.

Concentrated office buildings When it comes to choosing thermal equipment that provides hot water and heating, gas-fired boilers are no better.

FANGKUAI Boiler has summarized several purchase criteria for gas-fired boilers, so that you can understand this type of boiler more comprehensively and make reasonable judgments based on your own needs.

First, the operating costs.
       The “module” is equivalent to splitting a single large boiler into several small boilers. The “simple parallel combination” of the quantity can realize the demand of different steaming tons. The modular design structure determines the three characteristics of the boiler.
       1. Each boiler is spared for each other. Once a single boiler has a sudden failure, other boilers can be started immediately, and the impact on heating is very small.
       2, capacity expansion is good, many office buildings in different seasons, the demand for heating and other domestic heat load will change, the choice of module boiler can solve this situation perfectly, by increasing or decreasing the number of boilers at any time, to achieve a smaller investment Meet the needs.
       3. The requirements for the infrastructure of the boiler house are not high, which can greatly reduce the capital construction investment costs.

Second, whether low nitrogen emissions.
       Many office buildings are located in the central area of ​​the city. With the stricter air pollution emission standards in China, many cities have imposed coal-free or ultra-low-nitrogen emission requirements. The gas-fired boilers produced by Fangkuo can use nitrogen-emitting emissions of as low as 18 mg/m3 by using patented technology, which meets the boiler emission standards in all regions of China.

Third, the safety index.
       The centralized office building is generally densely staffed. Once a sudden disaster occurs, the consequences are unimaginable.
       FANGKUAI boiler can be equipped with intelligent remote monitoring cloud service system for each boiler. The professional supervisors observe the operation of the fast boiler in China within the whole day. Once an emergency situation is discovered, the early warning device is remotely activated and the user is notified online. Kill the danger in the cradle.

The above is what you need to pay attention to when selecting the gas module boiler for the office building provided by Fangfeng Boiler. I hope that you can better choose the boiler suitable for your enterprise. If you have any other questions about the boiler, you can call our technical engineer's hotline directly and we will do our best to help you.

In addition to the quality of the electric boiler and the quality of the after-sales service, the electric boiler should also pay attention to some operating specifications when using it, so as to avoid the harm to the person and property more effectively.

If the electric boiler is used for a long time, it will age. How to maintain the electric boiler? Fang Boiler professional boiler technical engineer, to take you to understand the maintenance of electric boilers. Generally, electric boilers must be repaired and maintained to a certain extent within 1-2 years. This will help the normal operation of electric boilers. Regular maintenance is also the basic condition for ensuring normal operation of electric boilers.

1. When maintaining and maintaining the boiler, you must pay attention to: cut off the power supply and relieve pressure.

2. The burner should be removed from the boiler body every two months on average, and the foreign matter such as carbon deposits and dust should be carefully removed. The photocell is wiped once a month on average, and the fuel filter should always be clean and well filtered. Carefully clean the filter inside the pump. Be careful not to damage the gasket. The burner must not be idling without oil to avoid damage to the pump.

3. The water level gauge should be kept clean at all times, and the cleaning valve should be opened once a day to ensure the water level is clear.

4. The safety valve is pulled once a day to prevent rust failure.

5. After the maintenance work is completed, check whether the tools, materials and accessories are complete, and prevent these accessories from remaining in the space such as the furnace.

6. Dedicated personnel will be removed from the work site after passing the inspection; then the maintenance records will be made for later enquiry work.

The correct water circulation protection measures of the gas hot water boiler can effectively prevent the water vaporization and water hammer and other bad phenomena from occurring after the water circulation pump suddenly stops. Based on years of industry experience, FANGKUAI Boiler will summarize the protection measures for the water circulation of gas hot water boilers for your reference.
       1. Between the inlet and outlet pipes of the circulating water pump, set the bypass pipe of the check valve, the pipe diameter should be close to the mother pipe, and the cross-sectional area of ​​the bypass pipe should not be less than 1/2 of the cross-sectional area of ​​the parent pipe; check valve The direction of the water flow should be consistent with the direction of the water flow of the pump.
       2. A heavy hammer type micro-opening safety valve is arranged on the inlet pipe section of the circulating water pump, and the overpressure drain pipe can be connected to the open water supply tank or the drainage ditch.

The design of circulating water system in gas hot water boiler room should also meet the following requirements:
       1. Each boiler outlet pipe shall be equipped with a shut-off valve or gate valve. The boiler inlet and supply pipes shall be provided with a shut-off valve and a check valve.
       2. When the hot water boilers are operated in parallel, a regulating valve shall be installed on the inlet pipe of each boiler so that the deviation of the outlet water temperature of the parallel boiler does not exceed 10 °C.
       3. The gas collecting and exhausting devices shall be installed at the high point of the boiler outlet pipe and the gas gathering place. The size of the exhaust valve shall not be less than DN20.
       4. The lower part of the system and the low recess should be provided with a drain pipe and a drain valve.
       5. The decontamination device should be installed at the position where the hot water system return water main pipe is convenient for cleaning. There should be a pressure gauge and a closing valve before and after the decontamination device, and there are bypass pipes 1 to 2 smaller than the main pipe.
       6. There should be multiple water heaters and water collectors in the boiler room for hotspots. The water separators and water collectors should be equipped with drain valves, thermometers, pressure gauges, etc.

In recent years, more and more users have begun to use electric heating boiler equipment. On the surface, people are beginning to realize the importance of environmental protection and energy conservation. The electric boiler produced by FANGKUAI Boiler is clean and environmentally friendly, pollution-free, noise-free and fully automatic because it has no combustion chamber and chimney. It is widely loved by users.

The various components of the electric steam boiler are made of different materials.
       1. In order to prevent electrochemical corrosion, cathodic protection measures must be taken.
       2. For the sewage treatment of the electric boiler, the sewage at the bottom of the boiler can prevent the condensation of the smoke. Flue gas condensation is caused by moisture in the flue gas (diesel or natural gas) and the temperature of the flue gas is too low. Some of this moisture is removed from the chimney, some is absorbed by the chimney wall, and the rest is deposited at the bottom of the chimney.
       The amount of water produced is affected by the following factors: the flue gas temperature (to achieve 91% thermal efficiency, the flue gas temperature needs to reach 170 °C), the total surface area of ​​the chimney, the material of the chimney and the insulation of the chimney. Burner repair. Maintenance of electric steam boilers and burners, after steam supply for maintenance. Because the products of combustion corrode the boiler and clean up the carbon deposits, the combustion products must not be left in the boiler for too long.
       3. The necessary content for electric boiler cleaning.
       When using the electric boiler, first open the burner door, remove the rear outer casing panel, unscrew the screw on the cleaning side of the electric boiler, clean the gas pipe with a wire brush, and clean the combustion chamber with a soft brush.
       The electric boiler removes the residue from the boiler, screws the cleaning port, closes the burner door, and checks whether the seal is complete.
       4. If the electric boiler is installed in an area where the temperature is below 0 °C, the following protective measures must be taken. If the electric boiler room is outdoors, the indoor temperature is lowered to 15 ° C or 18 ° C, so that the electric boiler runs all day. If there is no one in the room for a long time, the water in the electric boiler should be drained and the boiler should be stopped.

The convection pipe is the convection heating surface of the gas boiler, which is used to absorb the heat of the high temperature flue gas and increase the heating area of ​​the boiler. The performance effect of the convection tube bundle - endothermic, is related to the flue flow rate, the arrangement of the tubes, the way the flue gas is flushed, and is one of the most important components of the gas boiler.

The water wall tube is laid on the inner wall surface of the furnace, and is mainly used for absorbing the flame in the furnace and the radiant heat emitted by the high temperature flue gas, and has the function of cooling and protecting the furnace wall.

First, the cause of blasting water wall tube blasting
       1. The material is unqualified and the installation does not meet the requirements of the specification. If the pipe wall is stratified, the weld quality does not meet the grade requirements, and there are remnants in the pipe. Causes the tube wall to be partially overheated and burned out.
       2. The quality of the feed water does not meet the standard requirements, causing fouling of the pipe wall structure and affecting heat transfer. Causes the tube wall temperature to overheat and blast.
       3. The fly ash is seriously worn, and the thickness of the pipe wall is reduced.
       4. The fire rises too fast or the furnace is stopped too fast, and the tube is unevenly heated and the weld is broken.
       5. Boiler explosion may occur due to excessive boiler load, uneven combustion and serious coking outside the pipe.

Second, prevent explosion control measures
       l. Before the installation, the pipe should be strictly re-examined, and the welding must have a welding procedure guide, and the welding quality meets the design requirements. After the pipeline is installed, pass the ball through the ball to ensure that the pass rate reaches 100%.
       2. Strengthen water quality management, soften water once per shift and meet water quality standards, regularly check scale content and eliminate it, and regularly discharge pollutants.
       3. The water wall tube and the convection tube should be inspected regularly. It is found that the tube with deformation or thinning should be replaced in time. At the same time, attention should be paid to the quality of the inspection, which must meet the requirements of the specification.
       4. The boiler should not be overloaded (specified limit), pay attention to the combustion process in the furnace, and ensure that the combustion is uniform and stable.
       5, pay attention to the pipe coking situation, to achieve timely focus and pay attention to leakage.

The correct water circulation protection measures of the gas hot water boiler can effectively prevent the water vaporization and water hammer and other bad phenomena from occurring after the water circulation pump suddenly stops. Based on years of industry experience, FANGKUAI Boiler will summarize the protection measures for the water circulation of gas hot water boilers for your reference.

1. Between the inlet and outlet pipes of the circulating water pump, set the bypass pipe of the check valve, the pipe diameter should be close to the mother pipe, and the cross-sectional area of ​​the bypass pipe should not be less than 1/2 of the cross-sectional area of ​​the parent pipe; check valve The direction of the water flow should be consistent with the direction of the water flow of the pump.

2. A heavy hammer type micro-opening safety valve is arranged on the inlet pipe section of the circulating water pump, and the overpressure drain pipe can be connected to the open water supply tank or the drainage ditch.

The design of circulating water system in gas hot water boiler room should also meet the following requirements:

1. Each boiler outlet pipe shall be equipped with a shut-off valve or gate valve. The boiler inlet and supply pipes shall be provided with a shut-off valve and a check valve.

2. When the hot water boilers are operated in parallel, a regulating valve shall be installed on the inlet pipe of each boiler so that the deviation of the outlet water temperature of the parallel boiler does not exceed 10 °C.

3. The gas collecting and exhausting devices shall be installed at the high point of the boiler outlet pipe and the gas gathering place. The size of the exhaust valve shall not be less than DN20.

4. The lower part of the system and the low recess should be provided with a drain pipe and a drain valve.

5. The decontamination device should be installed at the position where the hot water system return water main pipe is convenient for cleaning. There should be a pressure gauge and a closing valve before and after the decontamination device, and there are bypass pipes 1 to 2 smaller than the main pipe.

6. There should be multiple water heaters and water collectors in the boiler room for hotspots. The water separators and water collectors should be equipped with drain valves, thermometers, pressure gauges, etc.

Explosion is one of the more serious accidents in gas-fired hot water boiler accidents. It will cause serious damage to equipment, heating systems and buildings, and it will cause great casualties and adversely affect social and economic development. Regarding the cause of the explosion of the gas hot water boiler, FANGKUAI Boiler summed up the following aspects and proposed an effective treatment method.

First, the cause of the explosion.
       1. Design and manufacturing problems
       Unreasonable boiler design results in uneven distribution of flow in each water circulation loop. The thermal deviation is too large, and the structure has fillet welds, squares, flat plates, and steel materials that do not meet the requirements; the manufacturing process for manufacturing and repair is not good. If the welding quality is unqualified, the boiler will be broken.
       2. Overpressure
       The operating pressure of the boiler exceeds the permissible working pressure, and the compressive stress (internal pressure) of the steel plate increases, which exceeds the strength limit of the steel plate and causes cracking. The main reason is that the safety valve is malfunctioning, the pressure gauge is faulty, and the console meter indicates an error.
       3. Overheating
       The steel plate is overheated and burned, and the main cause is that the scale is too thick or there is grease or other debris in the pot water, which blocks the heated surface.
       4. Corrosion
       After the inner and outer surfaces of the steel plate are severely corroded, the thickness is reduced, and the strength of the steel plate is insufficient to cause cracking.

Second, the solution.
       1. The following measures should be taken for the defects in the design: first, the design is reasonable; second, the materials are strictly controlled; third, the correct manufacturing process specification and process card (including repair); fourth, the establishment of necessary rules and regulations; The fifth is to improve the quality and responsibility of operators and managers.
       2. Strictly prevent overpressure. To ensure the sensitivity and reliability of the safety valve, automatic draining is required once a day. The problem should be dealt with in a timely manner, and a standard pressure gauge should be installed for comparison.
       3. Prevent overheating. Effective water treatment equipment must be configured and strict rules and regulations must be established. The boiler should be free of scale or scale and no grease. When the boiler is out of service, check the scaling. If there is scale, it must be cleaned up in time.
       4. Prevent internal corrosion. For larger capacity hot water boilers, thermal deaeration or chemical deaeration is used. In addition, check the internal and external corrosion conditions. Repair means such as replenishment or excavation according to the degree of corrosion (there must be a technical plan approved by the unit's chief engineer and reported to the local boiler supervision department).
       5. In order to prevent boiler explosion, the boiler should be inspected regularly. At the same time, the boiler management department must formulate effective measures. The operators and management personnel must strictly implement the safety code for stopping the boiler after minor accidents.

Boilers are classified as special equipment because of their certain security risks. All countries in the world have their own institutions and regulations to supervise them. If it is unable to meet local regulations, it will not be allowed to install and use. The FANGKUAI Boiler gives you a brief introduction to the boiler installation and use qualifications in various countries.

First, the general standard.
       The ASME standard is a standard of the American Society of Mechanical Engineers, and ASME-compliant boilers are accepted by most countries. Such as North and South America, the Middle East, the Philippines and other countries.

Second, individual standards everywhere.
       1. The EU as an independent region, in line with the PED directive is the basic condition for the boiler to enter the EU.
       2. India is a big country in South Asia and a major importer of boilers. If a boiler wants to enter India, it must comply with the Indian boiler program, IBR.
       3. Australian states have their own special requirements for boilers, but they also have to meet AS standards.
       4. Malaysia implements the DOSH standard, which is basically similar to the ASME standard.
       5. The Russian-speaking area can be produced using Chinese standards, but a CUTR certification is required to enter the customs.
       Note: In addition to the design and manufacture of materials according to local standards, the manufacturing process of the boiler requires a third-party agency inspection and a certificate or declaration of conformity to the standard. This is generally a necessary condition for the settlement of a letter of credit or the entry of goods. Each country has its own third-party inspection agency, but the inspection cost is not a small expense.
       In addition, meeting the transportation conditions of the place of use is also a basic condition for the boiler outlet. In many foreign countries, there are restrictions on transportation and lifting weight, and the quick-loading boiler cannot be loaded and unloaded locally.

FANGKUAI Boiler has been exported to Indonesia, Russia, North Korea, South Korea, the Philippines, Vietnam, Thailand, Australia, Mongolia, India, Singapore, Oman, Europe and America and other countries and regions since it began exporting boilers in 2000. Chemical, pharmaceutical, paper, brewing, textile, food, electronics, heating and other industries. And trained a group of professional technical and overseas technical teams to solve boiler problems for overseas users.

The electric steam boiler is a device that replaces electric energy into heat energy by electric heating, so that the boiler completes the reaction, and the device that outputs steam to the outside is deeply loved by users with its excellent characteristics of cleanness, environmental protection and pollution-free, and is gradually popularized.

The boiler has the title of “industrial oil”, which shows its importance. The application fields of electric steam boilers are also very extensive. The manufacture of various industrial products such as textile, printing, paper, food, plastics, chemicals, medicine, steel, metallurgy, etc. all have electric steam boilers, but also for enterprises, individuals, Domestic water is provided for schools, hotels, restaurants, baths, etc.

So, what are the precautions for users when purchasing electric steam boilers for the first time? FANGKUAI Boiler for your science.

First, thermal efficiency.
       The thermal efficiency is related to the operating cost of the electric steam boiler. The thermal efficiency of the electric steam boiler developed by Fangfang can reach more than 98%, which is about 20% higher than the thermal efficiency of the ordinary electric steam boiler on the market, so it is more energy-saving and economical.

Second, the steam time.
       The steam outlet time refers to the time taken from the start-up of the machine to the generation of steam that meets the temperature requirements. The shorter the time, the more energy-saving. The steaming time of a typical steam boiler is about 30 minutes. The electric steam boiler produced by Fangkuang boiler only takes 30 seconds to produce steam, which saves the company a lot of operating costs.

Third, energy saving and environmental protection.
       Many central cities in China implement air pollutant emission standards of 30 mg/m3, which is a challenge for many boilers. The electric steam boiler has no combustion chamber and no chimney, and does not need to consider the heat loss problem. At the same time, it has the characteristics of clean and pollution-free, and is more energy-saving and environmentally friendly.

Fourth, safety performance.
       The safe and stable operation of the equipment is undoubtedly a magic weapon that makes the enterprise more secure and more worry-free. The square electric steam boiler can adopt modular installation structure, and the customer can flexibly adjust the use of single or multiple devices according to the actual steam consumption, ready to use, simple maintenance and space saving. In addition, the boiler also adopts the PLC intelligent control system designed and developed by Fangqi, which is fully automatic and runs without special personnel, saving labor costs.

Of course, there are still many problems to be aware of when purchasing an electric steam boiler. The above aspects are among the more important factors. Combining the above factors, we can judge the quality of the electric steam boiler and help you purchase it for your own business. The boiler used.